Bus bar bender



N0V 30, 948 y J. wfGARRr-:TT 2,454,867

Bus BAR BENDER y Filed Nov. 29, 194e 3 Sheets-sheet 2 1 2f Z' Y NOV. 30,1,948. .5 J W, GARRETT. I

vBUS BAR BENDER Filed Nov. 29., 1946 3 Sheets-Sheet 3 n il 'I JNVENTOR.

Patented Nov. 30, 1948 UNE'EED STA'ES .P'ENT FFQE 6 Glaims. 1 Myinvention relates to tools and more particularly to bar bending tools.

The object of my invention is to provide a bar bending tool adapted toreceive and hold a bar and to facilitate the bending of said bar at aper-- feet ninety degree angle.

Another object of my invention is to provide a bar bending machine ofthe character indicated above adapted to be positioned, so that a bararranged in said bending machine can be bent downwardly or sidewardly ata perfect ninety degree angle.

Other objects of my invention may appear in the following specificationdescribing my invention with reference to the accompanying drawingsillustrating a preferred embodiment of my invention.

It is, however, to be understood that my invention is not to be limitedand restricted to the exact construction and combination of parts demscribed in the specification and shown in the drawings, but that suchchanges and modifications can be made, which fall within the scope ofthe claims.

In the drawings:

Figure l is an elevational side View of a bar bending machine accordingto my invention.

Figure 2 is a top plan view of Figure 1 showing the supporting channeland bus bar in horizontal position.

Figure 3 is a sectional view taken on line 3-3 in Figure 2.

Figure 4 is a fragmentary sectional view taken on line -d in Figure l,and

Figure 5 is a vertical sectional view through the bending lock-bars.

Figure 6 is a top plan view of Figure l showing the supporting channeland bus bar in vertical position.

Figure 7 is a sectional view taken on the line '1 -1 of Figure 6.

Referring now in detail to the drawings, the bar bending machine formingthe subject matter of my invention comprises a base Hl preferably madefrom an eight inch channel H. On the outside of each iiange of thischannel il a clip angle l2 is secured adjacent each end thereof forinstance by welding one leg of the clip angle onto the channel flange,so that the outside surn faces of the other angle leg and the channelweb are located in the same plane. The base it is arranged on a bench orwork table I3 and is fastened thereon by means of bolts Hl extendingthrough the outwardly extending legs of the clip angles l2 yand the worktable I3 and secured in position by washers l5 and nut I6 thereon.

Two annular base plates ll are provided in their circumferences with twoangular notches I8 adapted to receive the edges of the flanges of thebase channel Il therein. The annular base plates l1 are arrangedadjacent the ends of the base channel ll and are welded thereon.

One the left hand surface of each base plate l1 two threaded studs lilare secured and arranged diametrically opposite to each other at equaldistances from the center of the annular base plates il.

An annular positioning plate or rotary annulus 20 is adjustabiy mountedon each base plate ll in the following manner: Two slots 2l are providedin each positioning plate 2B. Each slot 2l is shaped like a quarter of acircle and is of such size and arranged, so that the two studs I9 oneach of the base plates Il are adapted to extend through the slots 2l inone of the posi tioning plates 25. This arrangement permits eachpositioning plate 2G to be rotated on the correspending base plate El tothe extent of ninety degrees. A nut 22 on each stud i9 is adapted tosecure the positioning plates 2o in adjusted position.

In the bores 23 of the positioning plates 2li a supporting channel 2d issecured by welding and is arranged therein, so that its web extendshorizontally or vertically, when the positioning plates 20 are rotatedrelative to the base plates Il, so that the studs I are located ateither end of the quarter-circular slots, and the flanges thereof eX-tend either downwardly or toward the right, when the bending machine isassembled. Preferably, the supporting channel is a six inch channel.

Two guide bars 25 are arranged on top of the supporting channel 2li andextend alongside the edges thereof between the left hand base plate lland the right hand positioning plate 2t.

Each guide bar 25 has on each end of its outer edge a fastening lug 2Sextending at right angles to the corresponding bar 25 .and parallel tothe adjacent iiange of the supporting channel 2t. In each fastening lug2li a tapped hole 2l is provided and in the adjacent support channelflange a plain hole 23 is arranged coaxially with the tapped hole 27.

A bolt 29 has a reduced end it rotatably extending through the hole 2Bin the supporting channel flange and on this reduced end a round head 3lis formed permitting rotary movement of the bolt 29 but preventing axialmovement thereof relative to the supporting channel 24.

The bolts 29 threadedly engage the threaded holes 21 in adjusting lugs26 on the guide bars 25, so that the guide bars can be adjusted toengage the edges of a bus bar 32 laid on the channel 24, so as toposition the bus bar correctly for a bending operation.

When a bus bar 32 is to be bent, the machine is arranged, so that thesupporting channel flange is positioned horizontally by loosening thenuts 22 on the studs IS and adjustingthe positioning plates 20 on thebase plates I1 and then fastening the nuts 22 again.

The bus bar 32 is marked at the place where it is to be bent, and a setof clamp bars is secured on the bus bar, so that the outer edges of thecla p bars are located on the marked place.

ne set of clamp bars consists of a rectangular to bar 33 having asubstantially squarecross sec-A tion and a bottom bar 34 having atriangular cross section of right angled isosceles shape. These twoclamp bars are secured onto thebus bar 32 by means of bolts 35 extendingthrough the top bar 33 and being screwed into the bottom bar 34.

AY second set of clamp bars consists of a'top clamp bar 36 shaped likethe rst mentioned top clar'np bar 33 but being equipped centrally on itstop surface with a handle bar 3'! and abottom clamp bar 38sh`aped likethe rst named bottom clamp bar 34. The second set of clamp bars isadjustably assembledk by means of bolts 33 ex tending through holes 4Din the top bar 36 and threadedly engaging tapped holes 4I in the bottombar 38.

The two sets of clamp bars are arranged on the bus bar so that thehypotenuses of the two triangular bottom bars 34 and 38 form a rightangle with each other, the apex whereof is located on the mark on thebus bar 32 and the bus bar 32 is located onthe support channel Mbetween1;

the guides 25. By pulling the handlebar 37 downwardly until the twobottom bars 34 and 38 abut each other the bus bar 32 is bent at aperfect ninety degree angle. In case the portionof the bus bar whichextends beyond the second set is so long, that it contacts the worktable I3 or the door before the bus bar is bent at ninety` degrees, thenuts 22 on the ystuds i9 are loosened and the adjusting plates 2n arerotated on the baseplates H until the supportchannel 2 4 is arrangedvertically. Then the nuts 22 are tightened again. The Ahandle bar 31then occupies a horizontal instead of a vertical position, and is swungin a horizontal plane to bend the bus bar 32. n

Having described my invention I claim as new 4nd desire to secure byLetters Patenti 1. A bus bar bending machine comprising an longated basearranged to be secured to a supporting surface, a pair of` platessecured to extend at right angles from s aidbase at longituqinauy spacedpoints, said pates being provided with aligned circular openings, rotaryannuli mounted on saidplates with their openings aligned with thecircular plate openings, means for limting rotation of said annuli topredetermined Varcs and f or locking said annuli in selected positionsof rotation relative to said plates, an elongated bus bar supportextending through the openings of Vsaid annuli and Xed to said annuli,guide bars extending along opposite sides of said sup- 4 port, meansaiording lateral adjustment of said guide bars to engage the oppositeside edges of a bus bar positioned lengthwise on said support forpositioning said bus bar relative to the sides of said support with oneend of the bus bar projecting longitudinally beyond the adjacent end ofsaid support, bending means arranged to be secured to the bus barcomprising a rsfl pair of bending bars secured atl opposite sides ofsaid end of the bus bar with one of said bending bars engaged with theadjacent end of the support, and a second pair of bending bars to besecured at opposite sides of the bus bar outwardly of said rstpair ofbending bars, and a handle on one of said second pair of bending barsfor swinging said second pair of bending bars relative to said rst pairof bending bars so as to bend the bus bar at a point between said pairsof bending bars.

2. The bus bar bending machine according to claim 1 wherein the m'eansfor limiting the rotation of s aid annuli comprisesstuds projecting fromsaid plates througharcuate slotsfornedin said annuli, and nuts on saidstudsfor lgcliing said annuliV in a selected position of rotationrelative tosaid plates;

3. The bus bar bending machine ac cordingto claim l wherein the meansfor limitingthe rotation of said annuli comprisesstuds projecting fromsaid plates through arcuate slets forrned in said annuli, and n uts onsaid studsfor locking said annuli in a selected position of rotationrelative to said plates, and wherein the means affording lateraladjustment of said guide barscomprises screws ysecured to the sides of saidbusbar support for rotation on their axes, sai d ,scr ews beingthreaded in portions of saidguide vbars whereby rotation of the screwsin one direction withdraws said guide bars laterally doutwardly androtation of said screws in the opposite direction moves said guide barslaterally inwardly with respect to the sidesof said support.

4. The bus bar bending machine according to c lairn 1 wherein the saidbending bars are elongated transversely with respect tothe length of thebus bar and have bolts traveising the ends of each pair of saidbars atpointslaterlly outward of the side edges of the bus bar and securing thebending bars at opposite sides of the bus bar.

5. The bus bar bending machine accordingto claim 1 wherein the annuliare positioned on the same sides of the related plates.

6. The bus bar bending machine according to claim 1 wherein the annuliare positioned on the sides of said plates remote from said bendingmeans.

JOSEPH W. GARRTT.

REFERENCS CITED The following references are of record in the le of thispatent: l

UNITED STATES PATENTS Name Date' Raymond Dec. 4,- 1894 Spencer July 16,1918 Farney July 18, 1939 FOREG PATN's Country Date Germany July 12,1886 lumber Number

